Alpha Technologies CFR 1500, CFR 1500RM - Manual (Page 61)

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3. INSTALLATION
3.1 Pre-Installation
Do not connect the CFR UPS to a line conditioner, isolation transformer or
any other similar type of device. Damage to the CFR UPS and the line
conditioning equipment can occur.
Site Preparation
The UPS should be installed upright in a well-ventilated, dust free
environment. The weight of the UPS, especially if it has an optional battery pack,
is quite heavy (see specifications). Do not place the unit on any surface unable to
fully support its weight.
Utility Circuit Breaker
The UPS should be installed on a dedicated circuit with a properly sized
circuit breaker. Breaker size can be determined by adding 15% to the maximum
input current of the unit (see specifications). For example, the CFR 1500 draws
11.9 Amps of current when configured at 120VAC. By adding 15%, the number
becomes 13.7 Amps. In this case, a standard 15 Amp circuit breaker is suitable
for use.
Grounding
Since the CFR UPS bonds output neutral to ground (qualifying it as a
"separately-derived power source"), proper grounding is critical. Many older facilities
may have an electrical system that is incapable of supporting this type of grounding
requirement. To ensure optimum performance from your UPS, always install a
hardwired ground. A qualified electrician should also inspect the existing wiring in
the building prior to installation to verify proper grounding.
Standby Generators
The CFR is equipped with a frequency sense circuit, along with a constant
slew frequency synchronization circuit, to optimize operation with most standby
generators. Prior to installation, compare the output voltage of the generator to the
voltage requirements of the UPS (see CFR nameplate label). If the UPS requires
240 VAC input and the generator produces only 208 VAC, it will cause the UPS to
run continuously off of battery power. This would discharge the UPS batteries and
cause the output to fail.
Alpha Technologies recommends using a generator equipped with an
electronic speed and voltage control. If a generator equipped with a mechanical
governor "speed control" is used, this could also cause the UPS to run continuously
in LINE FAILURE mode due to the unstable frequency of the generator.
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5. TERMINAL COMMUNICATION
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Set Custom Init cmd:
Modem initialization string, up to 30 characters. (default value is
“AT X4Q0V1 &H0&R1&I0&B1”, set by pressing ENTER)
This command is sent to the modem to initialize it. Refer to
section 4.2, “Configuring the modem to work with the CFR” to determine
the modem initialization string. The CFR sends this string followed by
the auto answer string to initialize the modem:
Set Remote Hang up Time:
0-100 minutes (default value is “2” minutes)
This command sets the time after which the CFR would hang-up
a nonactive remote call, i.e., if the host does not send any CFR menu
commands for this period, then the CFR forces the modem to drop the
connection. This prevents long delays in sending out alarm messages
when a remote host is hugging the line. Setting the hang up time to “0”
causes the CFR to never drop a remote call.
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5.10 External Modem Parameters, continued